Non-Transient Non-Community Water System · PWS 084690468
Crazy Horse School
Operator location Wanblee, EPA Region 8 — Tribal Water Systems - 28% of 71 violations are health-based (upper-third health share (> 23%)); surface water source; 360 served per SDWIS.
- 360
- People served (this PWS)
- 71
- EPA violations (this PWS)
- 20
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Crazy Horse School standing, mid SDWIS violation third
28% of 71 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 28% is upper-third health share (> 23%).
The verdict
Crazy Horse School lands in the middle third by violation volume (71), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (360; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 28% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 71
- Total EPA violations on record
- 28%
- Health-based (MCL / treatment failure)
- 360
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Federal
- Connections
- 33
- School/Daycare
- Yes
- MCL Violations
- 19
- Monitoring Violations
- 43
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 19 | 2007 |
| Coliform (TCR) | MR | 17 | 2005 |
| Lead and Copper Rule | MR | 15 | 2023 |
| Consumer Confidence Rule | Other | 7 | 2011 |
| Nitrate | MR | 2 | 2009 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2025 |
| Surface Water Treatment Rule | MR | 2 | 2023 |
| TTHM | MR | 2 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1982 |
| Revised Total Coliform Rule | MON | 1 | 2023 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 1 | 2018 |
Violation Count vs. the National Corpus
Crazy Horse School has 71 recorded EPA violations, 65% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 34% carry more. 28% of this system's own violations are health-based (20 of 71), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
71 Around the middle fewer violations than 34% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Crazy Horse School
20 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for 084690468.
Sources: EPA SDWIS
Nationwide peers
71 violations · 360 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Crazy Horse School
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 8 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 8 — Tribal Water Systems systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.